Details
| Original language | English |
|---|---|
| Title of host publication | Structures and Dynamics |
| Publisher | American Society of Mechanical Engineers(ASME) |
| Number of pages | 7 |
| ISBN (electronic) | 9780791858684 |
| Publication status | Published - 5 Nov 2019 |
| Event | ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition, GT 2019 - Phoenix, United States Duration: 17 Jun 2019 → 21 Jun 2019 |
Publication series
| Name | Proceedings of the ASME Turbo Expo |
|---|---|
| Volume | 7A-2019 |
Abstract
Advanced repair techniques intended for jet engine parts are continuously under development and improvement. Patching is a high-tech approach towards reduced scrap rates and an extended life of high pressure compressor blisks. In this work, we contribute to the structural design of patches for compressor blisks with improved high cycle fatigue behaviour. A fully parameterised patch model is developed, which allows the accurate description of the patch geometry. High cycle fatigue is assessed for welding seam positions specified by the patch model. On the basis of this automated process, a multi-objective optimisation is carried out. The fatigue strength and the length of the welding seam are defined as conflicting targets. Pareto-optimal solutions are calculated using a generalised pattern search algorithm. The engineer’s decision for a specific patch geometry can thus be made based on the optimisation results. The application of the new approach to a compressor blisk demonstrates the influence of vibration modes on fatigue strength. We identify sets of optimal suited patch geometries in accordance to the specified damage pattern.
ASJC Scopus subject areas
- Engineering(all)
- General Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
Structures and Dynamics. American Society of Mechanical Engineers(ASME), 2019. (Proceedings of the ASME Turbo Expo; Vol. 7A-2019).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Parametric design of blisk repairs by patching considering high cycle fatigue
AU - Berger, Ricarda
AU - Hofmeister, Benedikt
AU - Gebhardt, Cristian G.
AU - Rolfes, Raimund
N1 - Funding information: The authors kindly thank the German Research Foundation (DFG) for the financial support to accomplish the research project B4 ”Dynamical Behavior and Strength of Structural Elements with Regeneration-induced Imperfections” within the Collaborative Research Center (CRC) 871 - Regeneration of Complex Capital Goods.
PY - 2019/11/5
Y1 - 2019/11/5
N2 - Advanced repair techniques intended for jet engine parts are continuously under development and improvement. Patching is a high-tech approach towards reduced scrap rates and an extended life of high pressure compressor blisks. In this work, we contribute to the structural design of patches for compressor blisks with improved high cycle fatigue behaviour. A fully parameterised patch model is developed, which allows the accurate description of the patch geometry. High cycle fatigue is assessed for welding seam positions specified by the patch model. On the basis of this automated process, a multi-objective optimisation is carried out. The fatigue strength and the length of the welding seam are defined as conflicting targets. Pareto-optimal solutions are calculated using a generalised pattern search algorithm. The engineer’s decision for a specific patch geometry can thus be made based on the optimisation results. The application of the new approach to a compressor blisk demonstrates the influence of vibration modes on fatigue strength. We identify sets of optimal suited patch geometries in accordance to the specified damage pattern.
AB - Advanced repair techniques intended for jet engine parts are continuously under development and improvement. Patching is a high-tech approach towards reduced scrap rates and an extended life of high pressure compressor blisks. In this work, we contribute to the structural design of patches for compressor blisks with improved high cycle fatigue behaviour. A fully parameterised patch model is developed, which allows the accurate description of the patch geometry. High cycle fatigue is assessed for welding seam positions specified by the patch model. On the basis of this automated process, a multi-objective optimisation is carried out. The fatigue strength and the length of the welding seam are defined as conflicting targets. Pareto-optimal solutions are calculated using a generalised pattern search algorithm. The engineer’s decision for a specific patch geometry can thus be made based on the optimisation results. The application of the new approach to a compressor blisk demonstrates the influence of vibration modes on fatigue strength. We identify sets of optimal suited patch geometries in accordance to the specified damage pattern.
UR - http://www.scopus.com/inward/record.url?scp=85075526708&partnerID=8YFLogxK
U2 - 10.1115/gt2019-90351
DO - 10.1115/gt2019-90351
M3 - Conference contribution
AN - SCOPUS:85075526708
T3 - Proceedings of the ASME Turbo Expo
BT - Structures and Dynamics
PB - American Society of Mechanical Engineers(ASME)
T2 - ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition, GT 2019
Y2 - 17 June 2019 through 21 June 2019
ER -